共 21 条
Differential H3K4 methylation identifies developmentally poised hematopoietic genes
被引:115
作者:
Orford, Keith
[2
,3
]
Kharchenko, Peter
[1
,4
]
Lai, Weil
[1
]
Dao, Maria Carlota
[2
,3
]
Worhunsky, David J.
[2
,3
]
Ferro, Adam
[2
,3
]
Janzen, Viktor
[2
,3
]
Park, Peter J.
[1
,4
]
Scadden, David T.
[2
,3
]
机构:
[1] Brigham & Womens Hosp, Harvard Partners Ctr Genet & Genom, Boston, MA 02115 USA
[2] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Ctr Regenerat Med, Boston, MA 02114 USA
[3] Harvard Univ, Harvard Stem Cell Inst, Cambridge, MA 02138 USA
[4] Childrens Hosp, Informat Program, Boston, MA 02115 USA
关键词:
D O I:
10.1016/j.devcel.2008.04.002
中图分类号:
Q2 [细胞生物学];
学科分类号:
071009 ;
090102 ;
摘要:
Throughout development, cell fate decisions are converted into epigenetic information that determines cellular identity. Covalent histone modifications are heritable epigenetic marks and are hypothesized to play a central role in this process. In this report, we assess the concordance of histone H3 lysine 4 dimethylation (H3K4me2) and trimethylation (H3K4me3) on a genome-wide scale in erythro, development by analyzing pluripotent, multipotent, and unipotent cell types. Although H3K4me2 and H3K4me3 are concordant at most genes, multi-potential hematopoietic cells have a subset of genes that are differentially methylated (H3K4me2+/me3-). These genes are transcriptionally silent, highly enriched in lineage-specific hematopoietic genes, and uniquely susceptible to differentiation-induced H3K4 demethylation. Self-renewing embryonic stem cells, which restrict H3K4 methylation to genes that contain CpG islands (CGIs), lack H3K4me2+/me3- genes' These data reveal distinct epigenetic regulation of CGI and non-CGI genes during development and indicate an interactive relationship between DNA sequence and differential H3K4 methylation in lineage-specific differentiation.
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页码:798 / 809
页数:12
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